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Cyber Library MCP server

Which servers in the official MCP registry are Cyber Library's own, whether they answer, and what they offer. A program checked each of these, nobody copied them from a product page.

read 2026-10-21

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Whose server it is
  • Registry namecom.cyberlibrary/libraryverified in the MCP registry

The registry name sits under cyberlibrary.com. The registry only lets a publisher use that namespace after proving control of the domain through DNS or HTTP.

When we asked itchecked 2026-10-21
  • Stateanswerschecked 2026-10-21
  • Tools6
  • Server calls itselfcyber-library
  • Server version1.0.0
  • Protocol version2025-06-18

On 2026-10-21 the server answered initialize and tools/list without a sign-in. First answer in 112 ms.

Should an agent connect itNot proven either way yet
  • Whether its tools do the product's job has not been judged yet.
  • Checked on 2 of the 7 days it takes to judge reliability.

Once connected

  • For "search the library from an AI assistant via MCP", the likely first call is search_library.

Said by rules from the measurements above. The likely first call is a model's pick from the tool list; read its description before relying on it.

Measured dailydaily checks: 2, the first on 2026-10-21
  • INITE MCP scoreafter a weeka score needs 7 daily checks: 2 so far
  • Answeredmeasuring2 of the 7 daily checks it takes to print a share
  • Median first answer151 ms
  • Space in an agent's context≈ 989 tokensthe definitions of all its tools (6), which an agent carries on every turn
  • Tool definitionsA · 100 of 100
  • Typed results0 of 6 toolsdeclared outputSchema: results come typed, read once
  • Every tool passes all six checks.

What an agent can do with it

  • not sure · study web and network attack techniques for authorized testing
  • not sure · trace a security topic through the linked library structure
  • can do · search the library from an AI assistant via MCP

Each of the product's use cases, put to Jev against this server's tool list: can an agent do it with these tools?

Worth a look

None of the five warning signs in these definitions.

A program checks the server once a day: initialize and tools/list, no model. Tokens are the definitions' length at about four characters a token. The grade averages six checks of every tool's name, description, schema and annotations; it says how well the tools are described, not whether they work. The score weighs what was measured and nothing else: answering (30%), doing the product's job (25%), definitions (20%), context (10%) and use (15%). A part that was not measured is left out, and a hidden instruction caps the score at 40. The state of vendors' MCP servers: method and numbers →

Tools it offers6 tools · read 2026-10-21
  • search_library

    Full-text search over the published pages of cyberlibrary.com (titles, descriptions, paths). Returns the best matches with their path and URL; pass a path to get_page to read it. Docs: https://www.cyberlibrary.com/en/mcp

  • get_page

    Returns a page of the Cyber Library as markdown with its metadata (title, URL, breadcrumbs, last update, contributors) and, for folders, the list of child pages. Paths look like…

  • list_topics

    Lists the direct children of a folder of the library (or the six top-level sections when no path is given): title, path, number of sub-pages and description. Docs: https://www.cyberlibrary.com/en/mcp

  • get_outline

    Indented outline of the library tree below a path (default: whole library) down to a given depth. Useful to understand how a domain is organized before reading pages. Capped at 400 entries. Docs: https://www.cyberlibrary.com/en/mcp

  • search_planned_topics

    Searches the structure database snapshot of the Cyber taxonomy: every planned topic (8k+), including drafts not yet published on the site, with its status (draft, review, ready, generated, published) and position. Use get_planned_subtree…

  • get_planned_subtree

    Outline of the planned taxonomy below a topic id (from search_planned_topics; omit for the Cyber root) with each topic's kind and status. Capped at 400 entries. Docs: https://www.cyberlibrary.com/en/mcp

How to connect

Add the server to your MCP client config. Claude Desktop, Cursor and most other clients read this shape:

{
  "mcpServers": {
    "library": {
      "type": "http",
      "url": "https://www.cyberlibrary.com/api/mcp"
    }
  }
}

Add it

Claude Code, in a terminal

claude mcp add --transport http cyberlibrary https://www.cyberlibrary.com/api/mcp

Add to CursorAdd to VS Code

claude.ai, ChatGPT and other clients: add https://www.cyberlibrary.com/api/mcp as a custom connector in the settings.

Each line is something a program found when it went looking: the registry entry, the server's own answer, a spec that parses. A missing line means we did not find it, not that it does not exist.